Tube-welding machine



TUBE wELD-ING MAcHIjN-E n@ 23, 1924. V V1,520,221 v R. o, BERG ET AL lTUBE WELDING MACHINE Filed Juiy 28. w22-g 5 sheets-sheet' 2 Sil/wmv @m9i TUE WELDING MACHINE Filed July 28.y 1922 Asfshee'gs-shee@ s Lomme? R.o. BERG ETAL TUBE WELDING MACHINE Dec, 23, 1924.,

- Filed Juiy 28, 1922 5 Sheets-Sheiet 4 'Dem 23, 1924. 1,520,221 l R. o.BERG ET A1.

TUBEWELDING MACHINE Filed July 28. 1922 5 Sheets-Sheet 5 gnam, '5c/Meo0.85129 W01? @my ,Patented Dee. 23, 1924.

` UNITED.' STATES V 'ragazzi PATENT OFFICE.

RICHARD O. :eEEG AND sIMON BERG, or DETEOIT, MICHIGAN, AssIGNOEs ToMIcHI- GAN STEEL TUBE PRODUCTS COMPANY, or DETROIT, MICHIGAN, ACORPORATION F MICHIGAN.

TUBE-WELDING- MACHINE.

Ap'pncation mea my as, 1922.- serml No. 578,065.

i u all whom t may concern:

Be it known that RICHARD O. BERG and SIMON BERG, citizens of the UnitedStates, residing at Detroit, in the county of Wayne and State ofMichigan, have invented certain new and useful Improvements in Tube-Welding Machines, of which the following is a specification.

' This invention relates to tube 4welding machines and has for itsobject a tube welding machine designed to weld rapidly relatively largetube of heavy gauge, such for instance as 2136 and -gauge, used forautomobile propeller shaft housings and for rear axle housings.Heretofore it has been impossible to weld tube as large asvthis atsatisfactory continuous speed by the oxyacetylene process.

It is the object of the present invention to afford a machine that canaccomplish weldin gof this nature and'which is nicely controllable tosecure the best welding effects.

In the drawings,-y

Fig. 1 is a side elevation of the machine.

Fig. 2 is a plan` view of the torch support, taken on the line 2--2 ofFig. 1.

Fig. 3 is a section taken on the line 3 3 of Fig. 1. l

Fig. 4 is an enlarged plan view of one of the torch slides, showing across-section of the torch.

Fig. 5 is a fragmentary vertical longitudinal section through the torchsupport, taken on the lin-e 5-5 of Fig. 2.

35 Fig. 6 is a fragmentary vertical cross section through a portion ofthe torch support showing, both the torch and tip.

Fig. 7 is a front elevation o the pressure Gauges and pressure controlson the top of the feed roll block.

. Fig. 8 is a side elevation on the same. Y

Refer-rin to Fig. 1,-@ designates a feed roll block 1n which the feedrolls are supported in any suitable mannerr) is a second block-containing rolls whic serve to pull the tube along. c represents thesliding or pinch rollsbupported in suitable bearings d. It has n thoughtunnecessary to detail the sliding'blocks for the feedl rolls, thedovetails, etc., to give suitable adjustment and alignment. Thesefeatures are all well 'known and in. common use in this art.

Supported on the roll blocks or bearings a and bare the brackets e.These brackets BB form the rests un which the Opposite ends of the torchsupport and pan f are supported. A plan view of this supporting pan isshown in Fig. 2. Thisis a casting forming a shallow water chamberor'tray. g. This tray is .provided with elongated' slots it which areprotected by high walls z' so that the water cannot escape throughsupport. Bolts k can be inserted in any one o-f the three 'l pairs ofbolt holes j, conse# quently the torch-supporting slides dueto the threebolt` hole adjustment and due t0 the elongated slots m, can be nicelyadjusted at any point-along'v the slot. This is true of each one of thetorch slides, there being three in number. A

A vertical adjustment of eachftorch p can be had. The torch body'slidesthrough the vertical opening in the slide n. vClips s, s, are clampedaround the upper and lower portions of the torch and carry the A rackbar lv. This rack bar is engaged by the teeth of thel pinion u which canbe turned by the hand wheel t, when the jam nut y, is loosened. Thiswill raise and lower the torch and tip .e with respect to the work.

The torch support or water pan has extended ends 1 which are arranged torest on the rests e. These rests areprovided with upright posts 2through which is threaded 'j screws 3, o erated by the hand wheels 4.Onl the en s of each of these .screws is pinned or otherwise Isecured aWasher or ring l5, held between the forks 6 ofv the` post 7. Thisl post47 rises throughthe end 1 of 1 the torch support. Slots 8 are provided inthe end of the torch support. Over this slotis a plate 9 held againstthe slot walls by the coll spring 10 around the cap sc rew 11. This capscrew screws into the ,end of .L i the rest e which is a castingyprovided with the cap screws 12 by which i1t may be bolted to the rollIblock. This spring 10 is a relal tivelv stiff spring which introducesconsidgether.

` heating and one of these tips .e al and z2 is erable friction betweenthe base of the end of the torch support and upper face of the rest,consequently tends vto hold the torch support in any adjustment on theface of the rest that may be secured by manipulating the hand wheel 4and screws 3. These devices just described constitute the means Iforvshifting either end of the torch support laterally or both endslaterally to- The torch tips al and z2, arranged and controlled in a wayto be described, are one of the generic features of this invention. Weare aware that .it is old to use a plurality of'torches in a weldingtube, or plurality of welding jets issuing from a single tip. However,so far as we knowe-no one has heretofore arranged apluralityof-multipleare .used for preliminary heatino` and onerelatively long welding tip a2 whlch is used for the actual welding orfusion of the metal. This arrangement is very importantas it makes itpossible to adjust the apparatus to dierent 'thicknesses of tube andgauge. of tube with very little eiort. The preliminary heating .jetswhich issue through the tips 21 are provided with oxygen usuallymaintained at about 9- lbs. pressure and acetylene gas at about 5 lbs.pressure. These are the most suitable pressures to work with in.preliminary heating of tube. regulation take. place with thesepreliminary heating jets and they can be. maintained vat substantiallyconstant pressures, althoughy Howthe character of the tube may vary.v

Vwith the welding jets issuingfrom the ever, welding tip .22, pressuresbe `just right to get proper penetration of the heat withoutunusual-burr on the inside of the tubeor blow hples in the tube. v''ifhis is accomplished by suitable regulation of this tip. It will befound thatthe oxygen pressure will vary between 9 and 15 lbs. andtheacetylene pressure between 5 and 9 lbs. dependingy on the tube that isbeing welded.

This regulation is afforded by means of members the gauges and pressureregulatin shown 1n Fig; 7. These are al collected on the stand 12 on topofy the feed roll block a. This stand supports an upper acetylene main13 which conneetswith a pressure regulator 14 provided with a' gauge 15.

lt is not so essential that accurate i it is important that thel Unepressure regulator and one gauge for each torch. Similarly,.an oxygenmam 16 connects with pressure regulator 17 and auge 18. Conduits 19a,19" and 19 lead rom the' three pressure 'regulators `to the threeseparate torches and-'similar conduits 20?, 20" and 20c lead from theseparate acetylenepressure regulators and gauges to each of the torches.This permits the opera'- tor to nicely regulatethe pressures for boththe oxygen and acetylene gases for each Vtorch from a single-location.

Water enters the machine through the main 21, runs to the irst torchthrou hose 22, circulates throughthis toro andl is carried to the nexttorch through the hose 23, circulates through this torch and is carriedto .the third torch through the hose 2A. The water circulates throughthe third torch, th'enissues out through-the pipe .25

and drains into the ywater tray; or torch Support c generated by some 59Oxy-acetylene jets. Without thiswater cooling, the he-at would be verydestructive to the torches notwithstanding that each torch is Watercooled here it acts to cool the intense heat and would also makeit verydificult to opera-te the apparatus because of the in- 'ten'se heat. Ashieldl 26 is provided to enclose the sides of the torches and shieldthem against the heat arising from the oxya-cetylene jets. of the pan atone end through the depending tube 27 and runs out as an overflow at theother end throu h the pipev28 which discharges "over the raft rolls 29toV keep them cool. The torch tips are also preferably,waterc0oled anddrain into the water tray.

The tube seam vis guided to the 'jets by a mandril 29 `and a fin 30.

`What we .claim is:

1. ln a tube welding machine, the combination of a plurality of tips, acommon support for the tips. capable' of adjustment and carrying allthetips, i and separate means on said support for adjusting veach tipwith respect to the work.

2. 1n al tube `welding machine, the combination of a plurality of tips,a common support for the tips, and means for shifting the end-of saidsupport laterally.

3. In.V a tube welding machine, the combination of a plurality of tips,a common support'for said tips, and means for shifting eitherv or bothvends laterally to vary the welding line of 'the tips.

The overflow water runs out llt? x4. In la-tube'welding machine, thecomi bination of a plurality of multiple jet tips with` the jetslinearly arranged, a common justment ofA each tip with respect to theWork.

5. In a tube Welding machine, the combination of a plurality of multipleflame jet tips with the jets linearly arranged, a

common support for all the said tips, means' for shiftin1 said supportlaterally to adjust the lateral disposition of the Welding line, andmeans on this common support for supporting each tip and permitting alongitudinal adjustment of each tip in the-(Weldtips,

ing line. 1

6. In a tube Welding machine, the combination of a plurality of multipleflame jet tips having the jets arranged linearly in alignment, a commonsupport for the said means for shifting said support laterally to varythe lateral disposition of the Weldingl line,l means on said support foradjusting each tip vertically with respect to the Work and means on saidsupport for adjusting each tip longitudinally with respect to theWelding line.

7. In a tube Welding machine, the combination of a plurality of multipleflame jet tips, and a Water cooled common support for all of the saidtips.

8. In a .tube Welding machine, the combination of a plurality ofmultiple flame` jetl tips and a common support'jfor all of said tips'formed to provide a Water pan.

9. Ina tube Welding machine, the combination of a plurality of multi-plellame jet tips and a common support for said tips formed to provide aWater pan and deflectors secured on the sides ofthe water pan.

l l0. In a tube Welding machine, the combination of a plurality ofmultiple flame jet tips, a common support for all the said tipscomprisingv a bridging member provided with slots pe 'tt'ing'longitudinal adjustment of the tips and rests for supporting bination ofa plurality of multiple flame jet tips, a torch for each tip, a commonsupport in the form of a web member provided With longitudinal slots,slides for supporting each torch and adjustabley along the Walls of eachslotto vary the longitudinal adjustment of the tips and means forsupporting the bridging member.

13. In a tube Welding machine, the

combination of a plurality of multiple flame jet tips, a torch supportcomprising a web member provided With longitudinal slots, a slide oneach'slot for carrying and adjusting the torch, means :tor adjustlng thetorch vertically on the slide, and means for adjusting the slide alongthe slot.

14. In a tube Welding machine, the combination of a-plurality-ofmu'ltipleiame jetntips, a torch for each tip, a torch support in theform of a web member provided with longitudinal slots, a slide providedwith. a pinion and rack vertical adjustment for the torch, and means bywhich the torch may be clamped at various points along the -slots toprovide a longitudinal adjustment of the the torch.

In testimony whereof We aiix our signatures. v

RICHARD O. BERG. SIMON BERG.

